European Journal of Mechanics - A/Solids ( IF 4.4 ) Pub Date : 2020-07-03 , DOI: 10.1016/j.euromechsol.2020.104068 Rafal Rusinek
An ear is one of the smallest and the most important organs in a human body. Hearing loss becomes a significant problem for modern societies. Therefore, a non-linear model of the human middle ear is used to study effectiveness of a middle era implant. Special care is focused on the effect of floating mass transducer fixation on the ear system dynamics and sound transfer to the inner ear. A transducer fixation is realized by means of a coupler. Its characteristic plays the key role in stapes excitation. A numerical analysis for two variants of damping properties is performed, representing the intact and pathological ear stimulated by a low and strong external signal. A stiffness characteristic of the coupler can shift a main resonance region of the middle ear structure and cause polyharmonic and even chaotic motion of the stapes and the transducer. As a result, the conditions of regular and irregular vibrations of the stapes, near the primary resonance, are defined. Finally, practical remarks about how to avoid polyharmonic and irregular oscillations are proposed.
中文翻译:
传感器固定在人中耳对声音传递的影响
耳朵是人体最小,最重要的器官之一。对于现代社会而言,听力损失已成为一个重大问题。因此,人类中耳的非线性模型用于研究中时代植入物的有效性。特别注意的重点是浮动质量传感器固定对耳朵系统动力学和声音向内耳传递的影响。借助耦合器实现换能器固定。其特性在骨激发中起关键作用。对阻尼特性的两个变体进行了数值分析,代表了由低而强的外部信号刺激的完整和病理的耳朵。耦合器的刚度特性可能会移动中耳结构的主要共振区域,并导致骨和换能器产生多谐和甚至混沌运动。结果,限定了主共振附近的the骨的规则和不规则振动的条件。最后,针对如何避免多谐和不规则振荡提出了实用的建议。